LS Energy and Life

Identify the conversion made by the process of respiration.

• H₂O (water) and CO₂ (carbon dioxide) into O₂ (oxygen) and C₆H₁₂O₆ (glucose)

• H₂O (water) and O₂ (oxygen) into CO₂ (carbon dioxide) and C₆H₁₂O₆ (glucose)

• O₂ (oxygen) and C₆H₁₂O₆ (glucose) into H₂O (water) and CO₂ (carbon dioxide)

• H₂O (water) and C₆H₁₂O₆ (glucose) into O₂ (oxygen) and CO₂ (carbon dioxide)

Tags

NGSS.MS-LS2-3

Which of the following is an important connection between breathing and cellular respiration?

• cellular respiration requires CO2 (carbon dioxide)

• cellular respiration requires C6H12O6 (glucose)

• cellular respiration requires O2 (oxygen)

• cellular respiration requires H2O (water)

Overall, the process of cellular respiration __________.

• requires energy from the sun

• releases energy from food

• requires energy from food

• releases energy from the sun

Tags

NGSS.MS-LS1-7

During cellular respiration, glucose reacts with oxygen to produce water and carbon dioxide. Where in the cell does this reaction take place?

• in the mitochondria

• in the nucleus

• in the cytoplasm

• in the chloroplasts

Which statement best summarizes what happens to energy in an ecosystem when it reaches the top of the food chain?

• The flow of energy stops when the top predator dies.

• The flow of energy stops when a secondary predator decomposes.

• The energy flows in the opposite direction, back down the food chain.

• The energy is transferred to the soil and recycled back to the producers.

Tags

NGSS.MS-LS2-3

Consider the food chain shown in the diagram.

• Decomposers are producers.

• Decomposers are primary consumers.

• Decomposers form the last link in a food chain.

• Decomposers can also be a middle link in a food chain.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

Consider this food chain. A student wants to draw a smaller food chain that includes only two organisms. Which organisms could the student include that would be enough to make up a smaller food chain?

• the cricket and the mouse

• the snake and the hawk

• the grass and the cricket

• the mouse and the snake

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

A food chain includes species W, X, Y, and Z. In terms of the number of individuals, species W outnumbers species X, which outnumbers species Y, which outnumbers species Z. At which trophic level in the food chain is species Y?

• producer

• primary consumer

• secondary consumer

• tertiary consumer

Tags

NGSS.MS-LS2-3

Which of the following most accurately describes the process of photosynthesis?

• It requires energy from the sun.

• It releases energy from food.

• It requires energy from food.

• It releases energy from the sun.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

What are carbon dioxide (CO2) and water (H2O) converted into as a result of photosynthesis?

• O2 (oxygen) only

• C6H12O6 (glucose) only

• O2 (oxygen) and C6H12O6 (glucose)

• neither O2 (oxygen) nor C6H12O6 (glucose)

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6